Delamination detection with fibre Bragg gratings based on dynamic behaviour


Grouve, W.J.B. and Warnet, L. and Boer, A. de and Akkerman, R. and Vlekken, J. (2008) Delamination detection with fibre Bragg gratings based on dynamic behaviour. Composites Science and Technology, 68 (12). pp. 2418-2424. ISSN 0266-3538

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Abstract:The influence of a delamination on the resonance frequencies of laminated composite beam is investigated. A model, proposed by Mujumdar and Suryanarayan [Mujumdar PM, Suryanarayan S. Flexural vibrations of beams with delamination. J Sound Vib 1988;125(3):441–61], of the dynamic properties of delaminated isotropic beams is extended to anisotropic laminated beams. Parameter studies show that the resonance frequencies are a function of both delamination parameters (location and size) and laminate lay-up. Experimental and analytical resonance frequencies for undamaged and delaminated test samples show good agreement. The resonance frequencies of carbon-PEI laminated cantilever beams were measured using embedded fibre Bragg grating strain sensors. High frequency measurements were performed by using a slope-filter based interrogator.
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Copyright:© 2008 Elsevier
Engineering Technology (CTW)
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